What Is NSF (Non-Sufficient Funds)? NSF Fees and How to Avoid Them
By Markets & Investing DeskUpdated Nov 10, 2026
Definition
Non-sufficient funds (NSF) means a bank account lacks enough available money to cover a payment, so the bank returns it unpaid and may charge an NSF fee.
Key takeaways
- According to 2023 CFPB data, NSF fees averaged $32 to $34 per item at institutions that charged them.
- An NSF fee applies when the bank refuses the payment. An overdraft fee applies when the bank pays it and the balance goes negative.
- A merchant, landlord or other payee can charge its own returned-payment fee on top of the bank's fee.
- Federal rules require fee disclosure, but no federal law caps the amount of an NSF fee.
Non-sufficient funds (NSF), also written “not sufficient funds” or “insufficient funds,” describes a bank account that does not have enough available money to cover a payment presented against it. When that happens, the bank can refuse the payment and return it unpaid. The NSF fee is the charge some banks apply to the account holder for that returned item. A check returned this way is usually called a bounced check, and an electronic debit returned the same way is often labeled “item returned NSF” on a statement.
What NSF Means in Banking
The test a bank applies is whether the available balance covers the item at the moment it is processed. The available balance can differ from the ledger balance shown on a statement. Deposits still on hold and pending debit card transactions both affect what is actually available.
This explains the difference between “funds not cleared” and NSF. If you deposit a check and it is still on hold, the money appears in your ledger balance but is not yet available. A payment drawn against that money before the hold releases can be returned NSF, even though the deposit eventually clears. For most local checks, Regulation CC generally requires banks to make deposited funds available by the second business day, with exceptions that allow longer holds in certain situations.
The term appears in several contexts:
- NSF check (or cheque): a paper check the payer’s bank returns because the account cannot cover it.
- ACH NSF: an electronic debit, such as a utility autopay or loan payment, returned for insufficient funds.
- NSF rent: a rent payment that bounced. The landlord may charge a returned-payment fee as set by the lease and local law.
- NSF in accounting: when a customer’s check is returned, the business reverses the deposit in its books and deducts it during bank reconciliation, along with any bank fee for the returned item.
How NSF Fees Are Charged
When a check or electronic payment is presented and the available balance falls short, the paying bank decides whether to pay or return it. If it returns the item, it may assess an NSF fee, debited from the same account, which can push an already low balance lower.
The person or business you were paying does not receive the money. That payee may then:
- Charge its own returned-payment fee.
- Re-present the payment, often automatically, a few days later.
- Require a different payment method, or treat the bill as unpaid and apply late charges.
NSF vs. Overdraft Fees
Both fees stem from a shortfall, but they describe opposite outcomes.
Hypothetical example: Your checking account holds $100 and a $120 ACH payment arrives.
- The bank returns it. The payment fails, your balance stays at $100 minus any NSF fee, and the payee may charge you as well.
- The bank pays it. The payee is paid, your balance drops to −$20, and the bank may charge an overdraft fee. You then owe the bank the $20 plus the fee.
Debit card and ATM transactions
Under a Regulation E rule that took effect in 2010, a bank cannot charge an overdraft fee on an ATM withdrawal or a one-time debit card purchase unless you have opted in to that coverage, and you can revoke an earlier opt-in. Without it, a $40 purchase with $20 available is typically declined at the terminal, or the bank may pay it without charging an overdraft fee. Checks and recurring ACH debits are not covered by this opt-in rule, which is why NSF fees have mainly applied to those items.
Worked Example: How Re-Presentment Multiplies Fees
Hypothetical: A $60 loan payment is debited from an account holding $25. Assume the bank charges a $30 NSF fee per returned item, and the lender automatically resubmits failed payments up to two more times.
| Attempt | Available balance before | Outcome | Bank fee |
|---|---|---|---|
| 1 | $25 | Returned NSF | $30 |
| 2 | −$5 (after first fee) | Returned NSF | $30 |
| 3 | −$35 | Returned NSF | $30 |
One unpaid $60 bill has produced $90 in bank fees, before any late or returned-payment charges from the lender. The CFPB has said that charging repeated NSF fees on the same re-presented transaction may be unfair and unlawful under the Consumer Financial Protection Act.
How to Avoid NSF Fees
- Budget around payment dates. Know when autopays and checks will clear relative to payday.
- Track the available balance, not just the ledger balance, count deposits on hold as unavailable, and avoid scheduling payments larger than what is available.
- Set low-balance alerts. Many banks send a notification when the balance drops below an amount you choose.
- Link a savings account so the bank transfers money automatically to cover a shortfall. Some banks charge a transfer fee for this.
- Apply for an overdraft line of credit. Approval depends on credit underwriting, and the borrowed amount accrues interest, usually quoted as an APR.
- Review your fee schedule. A number of institutions no longer charge NSF fees, so switching accounts can remove the risk entirely.
Why Banks Charge NSF Fees and the Regulatory Background
Banks have pointed to processing costs and the burden of handling returned items. The CFPB’s study of overdraft programs also found that overdraft and NSF fees are a substantial, high-margin source of revenue for institutions that charge them.
NSF fees are legal. The Truth in Savings Act, implemented through Regulation DD, requires banks to disclose deposit account fees before an account is opened, and 2010 changes to Regulation DD added overdraft fee disclosures. Federal law prohibits unfair fee practices but does not set a maximum NSF fee.
Two practices have drawn the most scrutiny:
Transaction reordering. Some banks posted debits from largest to smallest instead of chronologically, so a large item drained the account first and more of the smaller items triggered fees. In 2011, Bank of America settled a class action over this practice for $410 million, and TD Bank settled a high-to-low posting class action for $62 million.
Multiple fees on one transaction. Some institutions charged a new NSF fee each time a creditor resubmitted the same payment, as in the example above. Navy Federal Credit Union settled such a case in 2020 for $16 million without admitting wrongdoing. A 2023 CFPB report found other banks and credit unions doing the same, sometimes charging again as soon as the next day. They committed to refunding affected consumers, and nearly all submitted plans to stop charging NSF fees altogether.
Limitations of the Term
“NSF” describes a single payment that failed. It does not tell you whether the bank charged a fee, whether the payee will retry, or whether the shortfall came from a hold rather than a lack of money. Fee names also vary: one bank’s “returned item fee” is another’s “NSF fee,” and some banks use “NSF paid item fee” for an item they covered despite the shortfall, which works like an overdraft fee. The deposit account agreement and fee schedule define what you are actually charged for.
FAQs
Can an NSF fee be waived?
Often, yes. You can ask for a reversal after the fee posts. Banks most often grant one as a one-time courtesy, especially if the fee resulted from a deposit hold or a re-presented item.
Do NSF fees affect your credit score?
Not directly. Banks generally do not report NSF transactions to the three major credit bureaus. However, a bill left unpaid because the payment bounced can lead to late payment reporting by the creditor, and unpaid negative balances or repeated bounced checks can go to collections or to specialty consumer reporting agencies that banks use to screen new account applicants.
What happens if I don't pay an NSF fee?
The bank normally deducts the fee from your account, so it is collected the next time money is deposited. If the account stays negative, the bank may close it and send the balance to collections.
The Bottom Line
Anyone with autopays or checks drawn on a thin balance faces the biggest risk, since one returned payment can bring a bank fee, a payee fee, and repeat charges if the payee resubmits. Watching the available balance, setting alerts, and linking savings all lower that risk. Checking the fee schedule matters most, because some institutions no longer charge NSF fees at all.
